IAP bootloader source code for STM8S

The application note states that it comes with source code for an example of an IAP bootloader implementation: “For this purpose, an example of a user-bootloader firmware is provided with this application note. This package is divided into three main subdirectories, each one dedicated to one STM8 family member: STM8AF, STM8L and STM8S. For the STM8AL family, please use the STM8L directory. Each directory is composed of the following components: ● Sources: containing the firmware source code”

However, the download link on the same page (STSW-STM8062) only has S19 hex files and no source code.

I was wondering if someone could provide me with the source code. Any help would be appreciated.